<template>
  <view>
    <my-search @Myclick="gotoSearch"></my-search>
    <view class="scroll-view-container">
      <scroll-view scroll-y="true" :style="{height:wh+'px'}" class="left-scroll-view">
        <block v-for="(item,index) in cateList" :key="index" >
          <view :class="['left-scroll-view-item',index===active?'active':''] " @click="activeChanged(index)">{{item.cat_name}}</view>
        </block>
      </scroll-view>
      <scroll-view scroll-y="true" :style="{height:wh+'px'}" class="right-scroll-view" :scroll-top="scrolltop">
       <view class="cate-lv2" v-for="(item2,index2) in cateLevel2" :key="index2">
          <view class="cate-lv2-title">/{{item2.cat_name}}/</view>
          <view class="cate-lv3-list">
                <!-- 三级分类 Item 项 -->
                <view class="cate-lv3-item" v-for="(item3, i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
                  <!-- 图片 -->
                  <image :src="item3.cat_icon.replace('dev','web')" mode="widthFix"></image>
                  <!-- 文本 -->
                  <text>{{item3.cat_name}}</text>
                </view>
                </view>
       </view>
      </scroll-view>
    </view>
  </view>
</template>

<script>
import badgeMix from '@/mixins/tabbar-badge.js'
  export default {
    mixins:[badgeMix],
    data() {
      return {
        wh: 0,
         cateList: [],
         active:0,
        cateLevel2: [],
        scrolltop:0
      }
    },
    onLoad() {
      const sysInfo = uni.getSystemInfoSync()
      this.wh = sysInfo.windowHeight-50,
        this.getCateList()
    },
    methods: {
    async getCateList(){
      const {data:res} = await uni.$http.get('/api/public/v1/categories')
      if(res.meta.status !==200) return uni.$showMsg()
      this.cateList = res.message
      // 为二级分类赋值
        this.cateLevel2 = res.message[0].children
    },
    activeChanged(index){
      this.active = index
      this.cateLevel2 = this.cateList[index].children
      this.scrolltop=this.scrolltop===0?1:0
    },
    gotoGoodsList(item3){
      uni.navigateTo({
        url:'/subpkg/goods_list/goods_list?cid='+item3.cat_id
      })
    },
    gotoSearch(){
     uni.navigateTo({
       url:'/subpkg/search/search'
     })
      
    }
    }
  }
</script>

<style lang="scss">
  .scroll-view-container {
    display: flex;
  
    .left-scroll-view {
      width: 120px;
  
      .left-scroll-view-item {
        line-height: 60px;
        background-color: #f7f7f7;
        text-align: center;
        font-size: 12px;
  
        // 激活项的样式
        &.active {
          background-color: #ffffff;
          position: relative;
  
          // 渲染激活项左侧的红色指示边线
          &::before {
            content: ' ';
            display: block;
            width: 3px;
            height: 30px;
            background-color: #c00000;
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
          }
        }
      }
    }
  }
  .cate-lv2-title {
  font-size: 12px;
  font-weight: bold;
  text-align: center;
  padding: 15px 0;
}
.cate-lv3-list {
  display: flex;
  flex-wrap: wrap;

  .cate-lv3-item {
    width: 33.33%;
    margin-bottom: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;

    image {
      width: 60px;
      height: 60px;
    }

    text {
      font-size: 12px;
    }
  }
}
</style>